Water Supply Outlook for Alberta
May 2008
Table 3b - Water Supply Forecast as of May 1, 2008 - Oldman River Basin
(Natural Flows) |
Volume Forecast for May 1 to September 30, 2008 | Year to date | |||||||
Locations | Volume in dam3 | Volume as a % of Average | Probable Range as a % of Average | Reasonable Minimum as % of Average | Forecast Ranking (lowest to highest) | Recorded March-April 2008 Volume as a % of Average | Ranking (lowest to highest) | |
St. Mary River | 677,000** | 101 | 86-123 | 68 | 51/91 | 42*** | 7/91 | |
Belly River | 214,000* | 96 | 86-113 | 75 | 38/91 | 41*** | 4/91 | |
Waterton River | 529,000* | 97 | 81-119 | 67 | 43/91 | 29*** | 1/91 | |
Oldman River near Brocket | 936,000* | 97 | 81-126 | 63 | 48/91 | 42*** | 6/91 | |
Oldman River at Lethbridge | 2,508,000* | 96 | 75-111 | 61 | 46/91 | 39*** | 5/91 |
*NOTE: The forecast shown is the March to September 2008 forecast minus the recorded volume to date Click on the site Location to see the Water Supply Forecast graphically ** - This value is the natural volume and includes the U.S. share *** - Recorded 2008 natural volumes are preliminary and subject to change Average is calculated for the period 1912 to 2001 NOTE: There is: a 50% chance that the actual natural flow will fall within the probable range given; a 25% chance that the actual flow will be less than the lower bound of the probable range given; and a 10% chance that the actual natural flow will be less than the reasonable minimum. Actual day to day streamflow conditions may vary throughout the season as a result of the effects of streamflow diversion and reservoir storage. |
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